Semiautomatic safety feed for redrawing presses



,J. F. KAISER SEIIAUTOIATIC SAFETY FEED FOR REDRAWING PRESSES sept. 15, 192s. 1,553,779

Filed Juiy '2. 1922 2 sheets-sheet 1 1,553,779 J. F. KAISER SBIIAUTOI'ATIC SAFETY FEED FOR REDRAWING PRESSES Filed July v, 192? 2 Sheets-Sheet 2 Patented Sept. 15, 192.5. f *f UNITED STATES PATENT o JOHN FREDRICK KAISER, F MADISON, WISCONSIN, ASSIGNOR i OOMPANY, A CORPORATION 0F WISCONSIN.

FFICE.

BUnGEss BATTERY SEMIAUTOMATIC lSAFETY FEED FOR REDRAWING PRESSES.

VApplication 1ed July 7,

To all whom t may concern: Be it` known that I, JOHN F. KAISER, a ,citizen of the United States, residing at Madison, in the countyV ofDane and State of Wisconsin, have invented certain new` and useful `Improvements in a Semiautomatic Safety Feed for Redrawing Presses; and I do hereby declarethey following to be a full, clear, and exact description yof the invention, such yas will enable others skilled in the arttowhich it appertains to make and use the same. Y Y

My invention is animprovement in feeds for redrawing'presses, ,and relates particularly to semi-automatic feeds. ,LVVith the usual construction of redrawing press, the articles to be redrawn are fed. between the die and the reciprocating punch, and eiliciency requires that there' be an article in the die properly positioned forengagement bythe punch at each reciprocation thereof. The articles are customarily vfed by hand, the operator placing the articles directly iny the dies, and in order to feed the articles,

' lthe hand or fingers of the operator mustbe introduced fora moment Abetween the punch and the die. If the operatoris negligent, or

is a little slow in withdrawing ythe handerk if the .press-operates for any, reason unexpectedly, the operators hands or fingers are the die, andv `caught; betweenthe punch and serious injury may result.

In kthe'present invention, I provide a means which is semifautomatic, lfor, feeding the ar- 4,ticles in' succession to .the-dies,` normallyl operative, and controlled to inoperative, position by the movement ofthe punch; and wherein ythe servicesfofjan operator are required only atadistancefrom the punch, to placethe articles Vin the feeding means.

I also soconstruct the feeding means, that, neither; speednor anyk great vdegree ,of care.. is necessitated in theinitialA placing ofthe v articlesin theifeeding means, the operation of the feedingvmeans; itself centering the articles for correct f feeding.

111th@ drawings; Figure lisa plainview of thel improved feeding means;

Fig. 2 is la front elevation;

VFigs and V5;fire {sections on Athe linesB--S and 5--5 respectively 0in-Fig.' l; and

Fig. 4is a view similar topFig.' 3,l showing the parts in .another position.,V y

In the presentyembodimentof thev invenl'ends of the pusher bar. Qmove through guides 17 yand 18 on the die 1922. VSerial vNo. 573,478;

tion, the articles indicated at 1, in the present instance Zinc battery cups or cans, are fed in succession into dies 2 of usual construction, with which cooperate punches 3,

the said punches drawing the cans or cups through the dies to properly shape the same. The dies are supported by the usual dieholder or bolster plate 4, the said holder having an opening 5 below each die, through which the completed cup is discharged. The punches are carried by a punch holder 6 'of usual construction, and a feed chute 7 extends forwardly from the die holder, the said chute having a guideway 8 for each punch, the cups which are to be fed beneath the punch moving in the adjacent guideway.

The guideways are of a length to yhold a number of cups, in the present instance five, exclusive of that. upon the die, and each guideway has at its top overlying flanges 9,

which prevent upward movement of the in a manner to be presently described. Coil ysprings 11 are connected with the ends of the pusher bar, and with hooked brackets ll2- eXtending from the die holder in the opposite direction to the chute, and these springs act normallyto draw the pusher vbar toward the punches. The pusher `bai is moved outwardly away from the punches, by means of cam plates 13 depending from the ends of the `punch holder 6. These cam plates khave their lower ends beveled as shown, and the beveled lower ends are adapted to engage rollers 14 on blocks or brackets 15, connected with guide rods 16, which are secured to the These guide rods vholder and they constrain the pusher bar to move squarely toward and from the punches,v

without any lateral movement.

A feed plate 19 is arranged above the chute at the outer ends of the guideways,

andthe said plate is provided with an opening 2() through which an article 1 may pass,

yat'each guideway. This plate is fixed, and

, said pusher bar is moved toward the punches y,

1 the punches The shutters move` with. *theA pusher bar, and y when. the pusher bar isilnitsforwardf position', that is in position nearest-the punches, the; shutter is beneathV the openingsi 20.

- I'Vhemhowerer, the pusherbaemoveslrear# wardly away fromlthe punches, the shutter uncoversV the openings 20,. and; permits the cups to dropymto the guideways.vr

The,operationk othe. impro-vement is asol-lows :,-Vith the parts in the position ofI Figure 3', a cup in; each lguide'way isi-ripositon beneatlr the adjacent punch', andr there l is a cupiineaclr opening '2010il theV feed plate.

Vfhen` now theypunch holder descends, the

cups in the dies-are` drawntlirough the dies; At thesame time, the cam plates 13 engage the rollers'y 14; ands'the,y pusher' bari-is moved away from-` the l punches, the roller riding up the beyelled ends of the,camlplates.k The shutters. are moved outl fromy `beneath the articles in openings2.( 9',and suchr. articles drop down between the shutters 21 -andf the cups. in', the guideways;. `Then the punches* more; upward, the camplates. graduallyy release the rollers 143i and thefsprin'gs- 112 which are under:V tension, contract andi move the pusher: bar' together with the shutters and theV cups: inn the.A guideways' towardl the punches,` bringing another.' cupY into eaehdie.V The operator merelyl places .the i cupsf 1n thel openingsy 20, and. since there 1s ampleitime,

no vspeed and no particularcare; lisvrequired in theplacingiot Lthe cups;A At nolti-mefisfitV` necessary for theoperat'or te insert hisg-fin gers: between the. punchzandz the' dies, .and as a consequence' there is-no liability f tel injury. W'lieir the punches i ascend', the-g' cups!whichk have been redrawn; are strippedol'f Iln-Vthe l present. drawing, seven; punches,y and seven guidewafys are shown. It will? be understoodf however, that `in; actual: operation? allA of thepunches:` and 'guidewayslmayl not be utilized,A and any' number 4may berutilized, from kone to the entire..numbers` Since the moving mechanism oi the feed y is coil springs,` injury isnot liable-'tol result fromr any stoppa`ge,l since: the springs wijlllfexert only. a moderate tension.. l

In.` operating.: theifeed: forl the press; when 3 engage; theA cups, the cups bulge betweeni the punch' ends and? the dies; This bulging is sufficient inl eaehi4 cupy to force a'llothe cups in' the adjacent guide-v way rearwardly, that is toward the feed plate 15X From this results thatthe cup The blocl'sl hayeltheir upperv which pis :being edlintofntheaopening; 20S` of the feed. platecamnot fall freelydnte normal position-to be fed toward the punch. Such cup. is-liable to-,catch upen-tliepgseeeding,eu-p-` inthe guideway-sothat the eeding operation is interfered" with. In order to overcome thier.,diiiiefuulty,,l I; pizovide the mechanism shown more particularly in Figs. 3 and 4 for holdingthe cups in the guideways last cup-in. theehuteijustbbeiiore vtllre punches descend, to` lholdltlhe cups against theabulgev ofthat eupbeing operatedi'-upony y Theser pins are normally pressed downward, byVIA springs 27 whiehfeneirclerthe pins-between an anmiilar shoulder: 25'fL0n`1-fthe-pin f and-'- al plate, 29 VseeuredxtoY tlrel-'topf-olthel' bar, itf being understood that :the bar hasfvertical' openings a fon receiving thef pins. 1 Eacliof l the openings in .the bairisrledueed below the ment. of: the pini,- andf th'e Ipinsi are: beyelled on the-side adjaeentffte thefeedf plate; so that when the .eed lpla'tel .moves-the cups; toward thezpunch'es, ther pins@ yw-illl be lilfted-` by the cupser cans to pernriiisaidcupsorfcans to passa Thepins arretheldlAfrom-retation, so thatl the-v bevelledl faceis: always properlypositioned, bymeans of akeylfSO. This key is: common :teX all` thepins,l en'gfag'd ing .Y a keywayy inieacll 1 pin;V WhenK the -'cups 'are fed ftoward theipunches,the pins1=aref lifteduand.VV dropped just within the 1 ferwardE part of the outermost-felipe `Whennew?theIY punches" descendu the'i v pins 'heldgl the l ,cups` againsty rearwamd moyementlaway -fifom the' punch, sel that,thel articles-mey'fbei properly fedinto thewmagazines. e v f Iel'aim: v l-.. In f a pressof thelclass described; the combination witlrvbhepuncl andthe f die; of means` for f feedi'ngjf articlesLA toward/ thedie, means controlledfby: themovement" of the punchl toward the die5 fon-fmovingsaid5 feedl ing meanszaway `Vfrom vthe die therebyfoeper,d mitl the inserting--o'an article between tliel said means andthe die iofbe -fedtowardithe die when the puneh'l-xneves--away fljo'fnf;the; die, and yielding means femmoyingfsai'ds feeding vme ans te-feed the articles toward; the die.

2. In a press ed?the-classf-described, `t-liecombination with"` the puneh'i and vthe' dieggof normally operiatiye means for feeding; a plu.; rality offfarticlestowardv the, die simultane: ously, means contrellc'nlE 'by'l tliefmovement :off the punch toward;{tle-L die? formovng-the feeding means away from the die, means for supporting an article in position t0 be dropped between the feeding means and the die, and 4arranged to be released by the movement of the feeding means away from the die, and yielding means for moving said feeding means to feed the articles toward the die.

3. In a press of the class described, the combination with the unch and the die, of spring-pressed means or moving the articlesV toward the die, and means controlled'by the movement of thepunch toward the die for moving the said means away from the die against the spring tension.

4. In a press of the class described,l the combination with the unch and the die, of spring-pressed means. or moving a plurality of articles toward the die simultaneously, means controlled by the movement of the punch toward the die for moving the said means away-fromvthe die, means for suppprting anarticle in position to be dropped tween the feeding means and thedie and arranged to be released by the movement of the feedin means away from the die, and

means for olding all of the articles in position when the feeding means is moved away from the die.

5. In a press including a-battery 0f dies and punches and a common means for reciprocating the punches, the combination of feeding chutes for the several dies arranged alongside each other, a common means for feeding a plurality of articles in each of the several chutes toward the dies simultaneously, yielding means for moving said feedin means to advance said articles toward said dies, and means controlled by the movement of the punches toward the dies for moving the article moving means away from the dies. i

6. In a press including a battery of dies and punches and a common means for reciprocating the punches, the combination of feeding chutes for the several dies arranged alongside each other, a common Vspringpressed means for moving a plurality of cup-shaped articles Yin each of the several chutes toward the dies simultaneously under the action of the spring pressure, means controlled by the movement of the punches toward the dies for moving the article moving means away from the dies, means adapted to engage the inner edge of certain of the cup-shaped articles to hold all of the articles in position when said `feeding means is moved away from the dies, and means for supporting articles above the feeding chutes in position to be dropped into said chutes adjacent to .the moving means and controlled to release position by the movement of the moving means away from the dies.

7. The combination with a` die and a punch, of spring-pressed means for feeding articlestoward the die and punch under the action of the spring pressure, and means responsive to t-he movement of the punch toward the die for moving said feeding means away from said die and punch.

8. In a press of the class described, the combination with the punch and the die, of spring-pressed means for moving the articles Vtoward the die yunder the action of the spring pressure, means controlled by the movement of the punch toward the'die for moving the said means away from the die, and means engaging the outermost of the seriesl of articles for holding the said articles from movement away from the die during the descent of the die, said means being controlled to inoperative position by the move ment of the articles toward the dies.

Intestimony whereof I affixl my signature.

AJOHN FREDRICK KAISER. 

